Cabletron Systems MMAC-Plus 9F116-01, User Manual, Page: 117 / 420

Configuring Frame Relay 6-35
Configuring Frame Relay Backup Groups
A Frame Relay Backup Group is one or more DLCIs (on the same RLP) that can act
as a backup for one or more "primary" DLCIs (also on the same RLP). If a node
detects a failure in a primary DLCI connection, the software will search any DLCI in
the backup group configured for the primary DLCI, and will select the first available
one as a backup. The backup will become operational and will remain in that state until
the primary becomes active again. If the backup fails while in use, the software will
check the status of the primary, then (if necessary) search the primary's backup group
for another backup.
Any sessions in progress when a primary DLCI goes down will not be
transferred directly to the backup DLCI, but will be reset, then established
on the backup.
To review existing backup groups, press [A] at the Frame Relay Backup Groups Con-
figuration Menu (or [A], [F], [A] from the Main Menu).
To configure a backup group, press [B] at the Frame Relay Backup Groups Configu-
ration Menu. When prompted, enter:
●
Frame Relay Backup Group Number : 1–255 . (The default is 1 .)
●
Any other requested information, noting Table 6-8.
1 Must be on the same RLP as the primary DLCI (the one being backed up).
2 The DLCI must have already been created in Port Configuration. Also, a DLCI cannot
be assigned to more than one backup group, nor can it be assigned to a backup group if
it is a primary DLCI (one that will be backed up).
3 See explanation.
RLP
identifies the RLP containing the primary and backup DLCIs.
Entry
is simply an identifier.
Table 6-8 Frame Relay Backup Group Parameters
Parameter Valid Values Default Value
RLP
FRX4000, FRM: 0
FRX6000:
0–7
0
Entr y 0–9 0
Por t 0–7
1
0
DLCI 16–991
2
16
WaitTimer 0–65535
(seconds)
120
ProtEnab Y/ N N 3
Delete? allows deleting an entry n/a n/a